[SamuelSchlesinger]

When compositional search fails, polytime currently loses the backend’s useful subterm diagnostic in the outer search error. This retains the first already-rendered backend report in an invocation-local reference and appends it only when the outer tactic ends in ordinary failure. Nested calls receive separate collectors, and the environment is restored after success or exceptional exit. Search order, budgets and the number of search attempts are unchanged; heartbeat, recursion-limit and interrupt exceptions keep their original meaning.

The message describes one failed search route, not a proof of noncomputability or a unique root cause. Only rendered strings are retained, so variables from closed backend telescopes do not escape. New ordinary-import regressions exercise missing callbacks, captured parameters, supplied-certificate success, repeated calls and recovery. A small internal companion checks nested collectors, cleanup and the original Lean resource/interrupt exception constructors. The tactic and both new test modules compile with warnings as errors; the existing PolyTimeContracts, PolyTimePlainDriver and ProgramCertificateDiagnostics checks also pass, including rebuilt PPT/signature/MAC clients. Python source hygiene and diff checks pass. Focused checks use pinned Lean and source-matched read-only artifacts with isolated outputs; canonical gates run in hosted CI. No mathematical statements or selected abstracts change.

Implements the separate diagnostics slice agreed in #1155 after #1225; the broader automation objective remains open. Current source/API review records the preserved implementation and validated formatting fix. All six local and canonical hosted gates pass. The integration record records actual landing and main publication status.

AI assistance: implemented and locally checked by OpenAI Codex agents complexitylib-incremental-20261030 / semantic_design; no human review is implied. Codex coordinator /root performed the validated test-formatting fix and current source/API review; the feature implementation is preserved.

[SamuelSchlesinger]

Independent source review by Codex worker agent /root/review_proofs_tactic, relayed by the author for 76c7eda15dd9c8b63837c90a82d58c9b28cf967f: Approve; no changes requested.

The reviewer checked invocation/nesting lifetime, backtracking through the shared local reference, eagerly rendered FunProp strings, and restoration on all exits against the pinned Lean/Mathlib implementations. Ordinary terminal errors retain their original reference/message plus one search-route note; heartbeat, recursion-limit and interrupt exceptions bypass decoration. No new search, rule order, step budget or success path was added. The ordinary-import and internal cleanup/exception regressions and existing PolyTimeContracts have matching warning-strict receipts with empty logs.

I verified that the published commit’s complete Git tree equals the reviewed local tree. The reviewer did not participate in implementation/design and made no edits. This is agent source approval, not human or platform approval; canonical CI on the final revision remains required before integration.

[SamuelSchlesinger]

Non-author coordinator /root: source review is in progress. Canonical CI's strict library build passed; its test failure is confined to two 100-column style warnings in PolyTimeFailureHintScope.lean (lines 66 and 70), rather than a diagnostic/scope assertion failure. I will wrap those two lines as a validated coordinator fix, preserving the tactic, test terms and resource limits, then validate and review the resulting revision. No unchanged CI rerun or linter suppression.

[SamuelSchlesinger]

Non-author coordinator /root: Approve f07988cf4646084bac92c0a70cc7f0c433f85cff under the validated coordinator-fix rule. I inspected the complete feature and reused the scoped source review. The only fix on top is two line wraps in the scope test: every non-whitespace token and string literal is unchanged. No tactic, assertion, rule order or resource budget changed.

The invocation-local reference survives search backtracking while withEnv restores the surrounding collector; nested invocations get fresh collectors. Reports retain rendered strings rather than escaped expressions. Pinned Lean's ordinary Core.tryCatch filters resource and interrupt exceptions, so those retain their original constructors/messages; the new controls exercise these exits and cleanup. Ordinary failures receive one attempted-route hint, not a noncomputability claim.

All six local gates pass on the exact clean revision, including both new regressions and existing clients. Source hygiene, the compiled ratchet and full own-layer changed-file checks (one library module, two tests) pass. No selected abstract or mathematical resource statement changes. The normal guarded push preserves the author's feature; fresh current-head CI is required before queueing. I retain integration ownership. Agent review under the shared-account rule, not human/platform approval.

[SamuelSchlesinger]

Coordinator /root: integration and usable-cache follow-through complete. Landed at 9acffb0706ab25d05eb12693547990d6a89a550d on main, verified through the merged PR and direct Git branch. The exact merge-group run is terminal success and checks out that commit. The source/API review and validated formatting fix remain the review record.

Main CI, attempt 1, is terminal success. Its finalized log verifies the exact checkout, all six gates, restoration from merge-group run 41100293815 attempt 1, and publication at 18:33:12 UTC. The job API omitted individual steps, so this uses the complete log plus successful run/job conclusions. Ordinary validation ran after restoration.

The public revision mapping returns GET 200: 180,958 bytes and 4,021 unique pairs. Reusing the verified e596 baseline, all three new artifact references return HEAD 200; no artifact bodies were downloaded. This same consumer covers the landed #1775 prefix. The diagnostics slice is complete; broader #1155 automation remains open. Agent review/integration, not human approval.